Ukraine’s leadership has been shaken after the resignation of Andriy Yermak, the head of the presidential office and chief negotiator for peace talks, a move that is reverberating across Europe and sending fresh uncertainty through Kyiv’s wartime agenda. Yermak stepped down on 28 November 2025 after anti-corruption authorities searched his home in connection with a widening scandal at the state nuclear energy company. His departure follows a dramatic raid by the country’s anti-graft agencies and marks one of the most serious political blows to date for President Volodymyr Zelenskiy’s administration. The investigation centres on alleged kickbacks amounting to nearly $100 million at the state nuclear energy firm, which has already resulted in the arrest of a former deputy prime minister. While Yermak himself has not been formally charged, his close ties to individuals under scrutiny and his prominent role as power broker in the presidential office rendered his position untenable. Public and political pressure had mounted for days in Kyiv. Yermak had been a central figure in Ukraine’s wartime governance, combining roles as negotiator, presidential chief of staff, and member of both the security council and the supreme commander-in-chief headquarters. His influence stretched across foreign policy, military supply coordination, and internal appointments. His exit removes a key conduit between Kyiv’s political leadership and its war-time administration. Western partners and European institutions have taken notice. The resignation triggered immediate concern over the stability of Ukraine’s negotiating apparatus just weeks before scheduled talks aimed at securing international support and managing peace proposals. Observers in Brussels and Washington are reportedly reviewing implications for ongoing diplomatic efforts and conditional aid tied to governance and anti-corruption reforms. Inside Ukraine the reaction has been mixed. For many citizens, the resignation is a sign that anti-corruption institutions are finally being allowed to act, even at the highest levels of power. For others, it raises fears that the vacuum left by Yermak’s departure could lead to paralysis or infighting within the presidential office at a time when national unity is critical. The sense of unease has spread rapidly. Leadership in the presidential office is now in flux. Zelenskiy has announced that consultations will begin immediately to appoint a successor, acknowledging the need to maintain cohesion but emphasising that Ukraine’s defence and negotiation efforts must continue. The decision to reorganise the office reflects both the domestic pressure to show accountability and the external imperative to project stability to allies. Russia and its Kremlin-aligned media have seized on the turmoil, with calls from Moscow portraying Kyiv as gripped by a deep political crisis. The Kremlin is using the opportunity to amplify doubt about Ukraine’s leadership and to press for concessions in ongoing negotiations. The timing of the leadership shake-up is therefore likely to influence Moscow’s propaganda narratives as well as diplomatic manoeuvres. ( Among Ukraine’s European neighbours the ripple effects are beginning to show. Several EU capitals that have backed Kyiv’s war effort now face pressure to reassess short-term plans for further sanctions relief, reconstruction funding, and support packages tied to governance reforms. Confidence in Ukraine’s ability to manage both war and internal governance simultaneously has been shaken. The reshuffling at the top comes at a critical moment for peace diplomacy and European unity. Kyiv’s negotiating team had been preparing for fresh talks with the United States and international partners over a potential ceasefire framework and long-term security guarantees. Yermak’s departure could complicate or delay those plans, raising questions about who will lead Ukraine’s delegation and whether any agreement can hold under renewed political uncertainty. For now Ukraine remains at war with Russia, and the pressure to balance military resistance, internal reform, and diplomatic negotiation has never been greater....